{"id":170231,"date":"2024-05-08T17:03:08","date_gmt":"2024-05-08T09:03:08","guid":{"rendered":""},"modified":"2024-05-08T17:03:15","modified_gmt":"2024-05-08T09:03:15","slug":"javascript-%e7%a8%8b%e5%ba%8f%e4%b8%ad%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-media-%e5%ae%9e%e7%8e%b0%e5%93%8d%e5%ba%94%e5%bc%8f%e5%b8%83%e5%b1%80","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/170231.html","title":{"rendered":"JavaScript \u7a0b\u5e8f\u4e2d\u5982\u4f55\u4f7f\u7528 media \u5b9e\u73b0\u54cd\u5e94\u5f0f\u5e03\u5c40"},"content":{"rendered":"

\"JavaScript<\/p>\n

\u54cd\u5e94\u5f0f\u5e03\u5c40\u662f\u5f53\u524d\u7f51\u9875\u8bbe\u8ba1\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\uff0c\u5728JavaScript\u7a0b\u5e8f\u4e2d\u4f7f\u7528media\u67e5\u8be2<\/strong>\u3001\u7ed3\u5408CSS\u548cDOM\u64cd\u4f5c<\/strong>\u662f\u5b9e\u73b0\u54cd\u5e94\u5f0f\u5e03\u5c40\u7684\u6709\u6548\u9014\u5f84\u3002Media\u67e5\u8be2\u5141\u8bb8\u5f00\u53d1\u8005\u6839\u636e\u4e0d\u540c\u7684\u5c4f\u5e55\u5c3a\u5bf8\u3001\u5206\u8fa8\u7387\u7b49\u6761\u4ef6\u5e94\u7528\u4e0d\u540c\u7684\u6837\u5f0f\u89c4\u5219\u3002\u901a\u8fc7\u5728JavaScript\u4e2d\u76d1\u542cresize<\/code>\u4e8b\u4ef6\u6216\u4f7f\u7528matchMedia()<\/code>\u65b9\u6cd5\uff0c\u5f00\u53d1\u8005\u80fd\u591f\u52a8\u6001\u5730\u6839\u636e\u7a97\u53e3\u5927\u5c0f\u6539\u53d8\u5143\u7d20\u7684\u6837\u5f0f\u6216\u529f\u80fd\uff0c\u4ee5\u9002\u914d\u5404\u79cd\u8bbe\u5907\u3002<\/p>\n<\/p>\n

\u5177\u4f53\u6765\u8bf4\uff0c\u4f7f\u7528media\u67e5\u8be2\u5b9e\u73b0\u54cd\u5e94\u5f0f\u5e03\u5c40\u7684\u8be6\u7ec6\u6b65\u9aa4\u5305\u62ec\u5b9a\u4e49\u5a92\u4f53\u67e5\u8be2\u7684CSS\u6837\u5f0f\u3001\u901a\u8fc7JavaScript\u76d1\u542c\u7a97\u53e3\u53d8\u5316\u4ee5\u53ca\u6761\u4ef6\u5224\u65ad\u540e\u5e94\u7528\u5bf9\u5e94\u7684\u6837\u5f0f\u89c4\u5219\u3002\u4e0b\u6587\u5c06\u6df1\u5165\u8bb2\u89e3\u8fd9\u4e9b\u6b65\u9aa4\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u7406\u89e3\u5a92\u4f53\u67e5\u8be2<\/h3>\n<\/p>\n

\u5a92\u4f53\u67e5\u8be2\uff08Media Queries\uff09\u662fCSS3\u4e2d\u7684\u4e00\u4e2a\u7279\u6027\uff0c\u5b83\u5141\u8bb8\u5f00\u53d1\u8005\u57fa\u4e8e\u4e00\u7cfb\u5217\u7684\u5a92\u4f53\u7279\u6027\u5982\u89c6\u53e3\u5bbd\u5ea6\u3001\u8bbe\u5907\u65b9\u5411\u7b49\u6765\u5e94\u7528CSS\u6837\u5f0f\u3002\u901a\u5e38\uff0c\u5a92\u4f53\u67e5\u8be2\u88ab\u5199\u5728CSS\u6837\u5f0f\u8868\u4e2d\uff0c\u4f46\u4e5f\u53ef\u4ee5\u901a\u8fc7JavaScript\u52a8\u6001\u751f\u6210\u6216\u4fee\u6539\u3002<\/p>\n<\/p>\n

\/* \u6837\u5f0f\u8868\u4e2d\u5b9a\u4e49\u5a92\u4f53\u67e5\u8be2 *\/<\/p>\n
@media screen and (max-width: 768px) {<\/p>\n
    .example {<\/p>\n
        background-color: blue;<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528JavaScript\u52a8\u6001\u5e94\u7528\u5a92\u4f53\u67e5\u8be2<\/h3>\n<\/p>\n
\u867d\u7136\u5a92\u4f53\u67e5\u8be2\u4e3b\u8981\u5728CSS\u4e2d\u4f7f\u7528\uff0c\u4f46JavaScript\u63d0\u4f9b\u4e86window.matchMedia()<\/code>\u65b9\u6cd5\uff0c\u5141\u8bb8\u5728\u811a\u672c\u4e2d\u76f4\u63a5\u63a2\u6d4b\u548c\u54cd\u5e94\u5a92\u4f53\u67e5\u8be2\u4e8b\u4ef6\u3002<\/p>\n<\/p>\n
function handleMediaQueryChange(mediaQuery) {<\/p>\n
    if (mediaQuery.matches) {<\/p>\n
        \/\/ \u5f53\u5a92\u4f53\u67e5\u8be2\u6761\u4ef6\u6ee1\u8db3\u65f6\uff0c\u6267\u884c\u7684\u4ee3\u7801<\/p>\n
        document.querySelector('.example').style.backgroundColor = 'blue';<\/p>\n
    } else {<\/p>\n
        \/\/ \u5f53\u5a92\u4f53\u67e5\u8be2\u6761\u4ef6\u4e0d\u6ee1\u8db3\u65f6\uff0c\u6267\u884c\u7684\u4ee3\u7801<\/p>\n
        document.querySelector('.example').style.backgroundColor = 'red';<\/p>\n
    }<\/p>\n
}<\/p>\n
\/\/ \u521b\u5efa\u5a92\u4f53\u67e5\u8be2List\u5bf9\u8c61<\/p>\n
const mediaQuery = window.matchMedia('(max-width: 768px)');<\/p>\n
\/\/ \u76d1\u542c\u5668\uff0c\u54cd\u5e94\u5a92\u4f53\u67e5\u8be2\u53d8\u5316<\/p>\n
mediaQuery.addListener(handleMediaQueryChange);<\/p>\n
\/\/ \u521d\u59cb\u68c0\u67e5<\/p>\n
handleMediaQueryChange(mediaQuery);<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u7ed3\u5408DOM\u64cd\u4f5c\u6539\u53d8\u5e03\u5c40<\/h3>\n<\/p>\n
\u54cd\u5e94\u5f0f\u8bbe\u8ba1\u4e0d\u4ec5\u5c40\u9650\u4e8e\u6539\u53d8\u989c\u8272\u6216\u5b57\u4f53\u5927\u5c0f\uff0c\u5176\u6838\u5fc3\u76ee\u7684\u662f\u8c03\u6574\u6574\u4f53\u5e03\u5c40\u4ee5\u9002\u5e94\u4e0d\u540c\u8bbe\u5907\u3002JavaScript\u63d0\u4f9b\u4e86\u5168\u9762\u7684DOM\u64cd\u4f5cAPI\uff0c\u53ef\u4ee5\u52a8\u6001\u8c03\u6574\u9875\u9762\u7ed3\u6784\u3002<\/p>\n<\/p>\n
function adjustLayout() {<\/p>\n
    \/\/ \u83b7\u53d6\u5bb9\u5668\u5143\u7d20<\/p>\n
    const contAI<\/a>ner = document.getElementById('container');<\/p>\n
    if (window.innerWidth < 768) {<\/p>\n
        \/\/ \u79fb\u52a8\u8bbe\u5907\u5e03\u5c40\u8c03\u6574<\/p>\n
        container.classList.add('mobile-layout');<\/p>\n
        container.classList.remove('desktop-layout');<\/p>\n
    } else {<\/p>\n
        \/\/ \u684c\u9762\u8bbe\u5907\u5e03\u5c40\u8c03\u6574<\/p>\n
        container.classList.add('desktop-layout');<\/p>\n
        container.classList.remove('mobile-layout');<\/p>\n
    }<\/p>\n
}<\/p>\n
\/\/ \u76d1\u542c\u7a97\u53e3\u5927\u5c0f\u53d8\u5316\u4e8b\u4ef6<\/p>\n
window.addEventListener('resize', adjustLayout);<\/p>\n
\/\/ \u9875\u9762\u52a0\u8f7d\u65f6\u8c03\u7528\u4e00\u6b21\uff0c\u786e\u4fdd\u521d\u59cb\u5e03\u5c40\u6b63\u786e<\/p>\n
document.addEventListener('DOMContentLoaded', adjustLayout);<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u4f7f\u7528CSS\u6846\u67b6\u7b80\u5316\u54cd\u5e94\u5f0f\u8bbe\u8ba1<\/h3>\n<\/p>\n
\u867d\u7136\u53ef\u4ee5\u5b8c\u5168\u624b\u52a8\u7f16\u5199\u54cd\u5e94\u5f0f\u6837\u5f0f\u548cJavaScript\u4ee3\u7801\uff0c\u4f46\u8bb8\u591a\u5f00\u53d1\u8005\u559c\u6b22\u4f7f\u7528\u5982Bootstrap\u3001Foundation\u7b49CSS\u6846\u67b6\u6765\u7b80\u5316\u5de5\u4f5c\u3002\u8fd9\u4e9b\u5efa\u7acb\u5728\u5a92\u4f53\u67e5\u8be2\u4e4b\u4e0a\u7684\u6846\u67b6\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u6837\u5f0f\u7c7b\u548c\u7ec4\u4ef6\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u5feb\u901f\u5b9e\u73b0\u54cd\u5e94\u5f0f\u8bbe\u8ba1\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u6700\u4f73\u5b9e\u8df5\u4e0e\u6027\u80fd\u8003\u91cf<\/h3>\n<\/p>\n
\u5728\u4f7f\u7528JavaScript\u5b9e\u73b0\u54cd\u5e94\u5f0f\u5e03\u5c40\u65f6\uff0c\u6709\u4e9b\u6700\u4f73\u5b9e\u8df5\u53ef\u4ee5\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u548c\u9875\u9762\u6027\u80fd\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u8282\u6d41\u6216\u9632\u6296\u51fd\u6570\u4f18\u5316\u4e8b\u4ef6\u76d1\u542c\u5668\u7684\u6027\u80fd<\/strong>\u3001\u7531\u4e8e\u591a\u4e2a\u5a92\u4f53\u67e5\u8be2\u53ef\u80fd\u540c\u65f6\u89e6\u53d1\uff0c\u56e0\u6b64\u5408\u7406\u5b89\u6392\u4ee3\u7801\u548c\u907f\u514d\u91cd\u7ed8\u6216\u91cd\u6392\u6210\u4e3a\u63d0\u5347\u54cd\u5e94\u901f\u5ea6\u7684\u5173\u952e\u3002<\/p>\n<\/p>\n
\u516d\u3001\u524d\u666f\u4e0e\u517c\u5bb9\u6027\u95ee\u9898<\/h3>\n<\/p>\n
\u54cd\u5e94\u5f0f\u8bbe\u8ba1\u7684\u524d\u666f\u65e0\u7591\u662f\u5149\u660e\u7684\uff0c\u968f\u7740\u79fb\u52a8\u8bbe\u5907\u7684\u666e\u53ca\u548c\u5c4f\u5e55\u5c3a\u5bf8\u591a\u6837\u5316\uff0c\u5b83\u5df2\u6210\u4e3aweb\u8bbe\u8ba1\u7684\u6807\u51c6\u4e4b\u4e00\u3002\u540c\u65f6\uff0c\u8003\u91cf\u5230\u4e0d\u540c\u6d4f\u89c8\u5668\u5bf9\u5a92\u4f53\u67e5\u8be2\u7684\u652f\u6301\u5ea6\uff0c\u517c\u5bb9\u6027\u95ee\u9898\u662f\u5b9e\u9645\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u9700\u8981\u8003\u8651\u7684\u3002<\/p>\n<\/p>\n
\u4e03\u3001\u6d4b\u8bd5\u4e0e\u8c03\u8bd5<\/h3>\n<\/p>\n
\u5f00\u53d1\u5b8c\u6210\u540e\uff0c\u4f7f\u7528\u5de5\u5177\u5982Chrome\u5f00\u53d1\u8005\u5de5\u5177\u8fdb\u884c\u6d4b\u8bd5\u548c\u8c03\u8bd5\u81f3\u5173\u91cd\u8981\u3002\u901a\u8fc7\u8fd9\u4e9b\u5de5\u5177\uff0c\u53ef\u4ee5\u6a21\u62df\u4e0d\u540c\u8bbe\u5907\u5c4f\u5e55\u5c3a\u5bf8\uff0c\u68c0\u9a8c\u54cd\u5e94\u5f0f\u5e03\u5c40\u7684\u6548\u679c\uff0c\u5e76\u5bf9\u6f5c\u5728\u95ee\u9898\u8fdb\u884c\u6392\u67e5\u548c\u4fee\u590d\u3002<\/p>\n<\/p>\n
\u603b\u800c\u8a00\u4e4b\uff0cJavaScript\u4e0emedia\u67e5\u8be2\u7684\u7ed3\u5408\u4e3a\u54cd\u5e94\u5f0f\u5e03\u5c40\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u652f\u6301\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u7f51\u9875\u53ef\u4ee5\u7075\u6d3b\u9002\u914d\u4e0d\u540c\u8bbe\u5907\uff0c\u4e3a\u7528\u6237\u5e26\u6765\u826f\u597d\u7684\u9605\u8bfb\u548c\u4ea4\u4e92\u4f53\u9a8c\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u5728 JavaScript \u7a0b\u5e8f\u4e2d\uff0c\u5982\u4f55\u6839\u636e\u7528\u6237\u7684\u5c4f\u5e55\u5c3a\u5bf8\u6765\u5b9e\u73b0\u54cd\u5e94\u5f0f\u5e03\u5c40\uff1f<\/strong><\/p>\n
\u901a\u8fc7\u4f7f\u7528\u5a92\u4f53\u67e5\u8be2\uff08media queries\uff09\u53ef\u4ee5\u5728 JavaScript \u4e2d\u5b9e\u73b0\u54cd\u5e94\u5f0f\u5e03\u5c40\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528window.matchMedia()<\/code>\u65b9\u6cd5\u6765\u68c0\u6d4b\u7528\u6237\u5c4f\u5e55\u7684\u5a92\u4f53\u7279\u6027\uff0c\u7136\u540e\u6839\u636e\u4e0d\u540c\u7684\u7279\u6027\u5e94\u7528\u4e0d\u540c\u7684\u6837\u5f0f\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u68c0\u6d4b\u5c4f\u5e55\u5bbd\u5ea6\uff0c\u7136\u540e\u5728\u67d0\u4e2a\u7279\u5b9a\u7684\u5bbd\u5ea6\u503c\u4e0b\u5e94\u7528\u4e0d\u540c\u7684\u6837\u5f0f\u3002<\/p>\n
const mediaQuery = window.matchMedia("(max-width: 768px)");\n\nfunction handleMediaQuery(mediaQuery) {\n  if (mediaQuery.matches) {\n    \/\/ \u5728\u5c4f\u5e55\u5bbd\u5ea6\u5c0f\u4e8e\u7b49\u4e8e768px\u65f6\u5e94\u7528\u7684\u6837\u5f0f\n    \/\/ \u4fee\u6539\u6216\u66ff\u6362\u4f60\u60f3\u8981\u5e94\u7528\u7684\u6837\u5f0f\n    document.body.style.backgroundColor = "red";\n  } else {\n    \/\/ \u5728\u5c4f\u5e55\u5bbd\u5ea6\u5927\u4e8e768px\u65f6\u5e94\u7528\u7684\u6837\u5f0f\n    \/\/ \u4fee\u6539\u6216\u66ff\u6362\u4f60\u60f3\u8981\u5e94\u7528\u7684\u6837\u5f0f\n    document.body.style.backgroundColor = "blue";\n  }\n}\n\nhandleMediaQuery(mediaQuery); \/\/ \u9875\u9762\u52a0\u8f7d\u65f6\u6267\u884c\u4e00\u6b21\n\nmediaQuery.addEventListener("change", handleMediaQuery); \/\/ \u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\uff0c\u5f53\u5a92\u4f53\u67e5\u8be2\u7ed3\u679c\u6539\u53d8\u65f6\u6267\u884c\n<\/code><\/pre>\n
2. \u5982\u4f55\u901a\u8fc7 JavaScript \u7a0b\u5e8f\u4e2d\u7684\u5a92\u4f53\u67e5\u8be2\u5b9e\u73b0\u591a\u79cd\u65ad\u70b9\u7684\u54cd\u5e94\u5f0f\u5e03\u5c40\uff1f<\/strong><\/p>\n
\u5728 JavaScript \u4e2d\u4f7f\u7528\u5a92\u4f53\u67e5\u8be2\u65f6\uff0c\u53ef\u4ee5\u6839\u636e\u9879\u76ee\u9700\u6c42\u5b9a\u4e49\u591a\u4e2a\u65ad\u70b9\uff0c\u5e76\u4e3a\u4e0d\u540c\u7684\u65ad\u70b9\u5e94\u7528\u5bf9\u5e94\u7684\u6837\u5f0f\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u6839\u636e\u5c4f\u5e55\u5bbd\u5ea6\u8bbe\u7f6e\u591a\u4e2a\u5a92\u4f53\u67e5\u8be2\u3002<\/p>\n
const smallScreenQuery = window.matchMedia("(max-width: 576px)");\nconst mediumScreenQuery = window.matchMedia("(min-width: 577px) and (max-width: 992px)");\nconst largeScreenQuery = window.matchMedia("(min-width: 993px)");\n\n\/\/ \u8bbe\u7f6e\u5404\u4e2a\u65ad\u70b9\u7684\u6837\u5f0f\u5904\u7406\u51fd\u6570\nfunction handleSmallScreenQuery(query) {\n  if (query.matches) {\n    \/\/ \u5c4f\u5e55\u5bbd\u5ea6\u5c0f\u4e8e\u7b49\u4e8e576px\u65f6\u7684\u6837\u5f0f\u5904\u7406\n    \/\/ \u4fee\u6539\u6216\u66ff\u6362\u4f60\u60f3\u8981\u5e94\u7528\u7684\u6837\u5f0f\n  }\n}\n\nfunction handleMediumScreenQuery(query) {\n  if (query.matches) {\n    \/\/ \u5c4f\u5e55\u5bbd\u5ea6\u5728577px\u5230992px\u4e4b\u95f4\u65f6\u7684\u6837\u5f0f\u5904\u7406\n    \/\/ \u4fee\u6539\u6216\u66ff\u6362\u4f60\u60f3\u8981\u5e94\u7528\u7684\u6837\u5f0f\n  }\n}\n\nfunction handleLargeScreenQuery(query) {\n  if (query.matches) {\n    \/\/ \u5c4f\u5e55\u5bbd\u5ea6\u5927\u4e8e\u7b49\u4e8e993px\u65f6\u7684\u6837\u5f0f\u5904\u7406\n    \/\/ \u4fee\u6539\u6216\u66ff\u6362\u4f60\u60f3\u8981\u5e94\u7528\u7684\u6837\u5f0f\n  }\n}\n\nsmallScreenQuery.addEventListener("change", handleSmallScreenQuery);\nmediumScreenQuery.addEventListener("change", handleMediumScreenQuery);\nlargeScreenQuery.addEventListener("change", handleLargeScreenQuery);\n<\/code><\/pre>\n
3. \u5982\u4f55\u901a\u8fc7 JavaScript \u7a0b\u5e8f\u4e2d\u7684 media \u5b9e\u73b0\u4e0d\u540c\u8bbe\u5907\u7684\u54cd\u5e94\u5f0f\u5e03\u5c40\uff1f<\/strong><\/p>\n
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